<template>
  <div class="comment-reply">
    <van-nav-bar
        :title="comment.reply_count > 0 ? `${comment.reply_count}条回复` : '暂无回复'"
    >
        <van-icon 
            slot="left" 
            name="cross"
            @click="$emit('close')"
        ></van-icon>
    </van-nav-bar>

    <div class="scroll-wrap">
        <!-- 当前评论项 -->
        <CommentItem :comment="comment"/>
        <!-- /当前评论项 -->

        <!-- 评论的回复列表 -->
        <van-cell title='全部回复'/>
        <CommentList 
            :list='commentList'
            :source="comment.com_id"
            @updateList="commentList.push(...$event)"
            type="c"
        />
        <!-- /评论的回复列表 -->
    </div>

    <!-- 底部区域 -->
    <div class="post-wrap">
        <van-button 
            class="write-btn" 
            size="small" 
            round
            @click="isPostShow = true"
        >写评论</van-button>
    </div>
    <!-- /底部区域 -->

    <!-- 发布评论 -->
    <van-popup v-model="isPostShow" position="bottom">
        <CommentPost
            :target="comment.com_id"
            @post-success = 'onPostSuccess'
        />
    </van-popup>
    <!-- /发布评论 -->
  </div>
</template>

<script>
import CommentItem from './comment-item.vue'
import CommentList from './comment-list.vue'
import CommentPost from './comment-post.vue'

export default {
    name: 'CommentReply',
    components: {
        CommentItem,
        CommentList,
        CommentPost
    },
    props: {
        comment: {
            type: Object,
            required: true
        }
    },
    data() {
        return {
            isPostShow: false ,//控制底部评论弹出层
            commentList:[]  //评论的回复列表
        }
    },
    methods: {
        onPostSuccess(data) {
            // console.log(data);
            // 更新回复的数量
            // this.comment.reply_count++
            this.$emit('updateReplyCount')
            // 关闭弹层
            this.isPostShow = false
            // 将最新回复的内容展示到列表的顶部
            this.commentList.unshift(data.new_obj)
        }
    }
}
</script>

<style scoped lang="less">
.scroll-wrap{
    position: fixed;
    top: 92px;
    left: 0;
    right: 0;
    bottom: 88px;
    overflow-y: auto;
}

.post-wrap{
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 88px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #fff;
    border-top: 1px solid #d8d8d8;
    .write-btn{
        width: 60%;
    }
}
</style>